US Patent No: 5,001,752

Number of patents in Portfolio can not be more than 2000

Public/key date-time notary facility

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A time notarization apparatus and method is disclosed which uses a secure, microprocessor based hardware platform which performs public key cryptographic operations to obtain trusted time stamping with a minimum of intervention by third parties. The hardware platform is encapsulated in a secure fashion so that the device's timestamping mechanism may not be readily tampered with or altered. The hardware platform includes at least one digital clock and a stable, secure storage device to record the private half of a public/private key pair. Coupled to both the digital clock and the storage device is a data processing device which performs public key signature operations in a secure and tamper-proof manner. Only the processing device has access to the secure storage device and its associated private key. The hardware platform also includes input/output means which receives a digital message which is to be digitally signed and timestamped and which outputs the resulting timestamped signature generated by the device. The hardware platform also includes a power source, (e.g., an on-board battery) to ensure the accuracy of the device's digital clock and the security of storage data prior to installation or in case of a power failure.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • Assignment data not available. Check PTO

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fischer, Addison M Naples, FL 33 3327

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MANITOBA TELEPHONE SYSTEM, THE (1)
* 4,897,875 Key management system for open communication environments 46 1987
 
Corpra Research, Inc. (1)
* 4,575,621 Portable electronic transaction device and system therefor 407 1984
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
* 4,625,076 Signed document transmission system 101 1985
 
MIU INDUSTRIES LTD. 1600-609 GRANVILLE STREET (1)
* 4,797,928 Encryption printed circuit board 43 1987
 
GENERAL INSTRUMENT CORPORATION (1)
* 4,710,955 Cable television system with two-way telephone communication path 209 1985
 
The United States of America as represented by the Secretary of Commerce (1)
* 4,386,233 Crytographic key notarization methods and apparatus 107 1980
 
SCHLAGE LOCK COMPANY (1)
* 4,837,822 Cryptographic based electronic lock system and method of operation 47 1986
 
PITNEY BOWES INC. (1)
* 4,637,051 System having a character generator for printing encrypted messages 197 1983
 
BRITISH TECHNOLOGY GROUP LIMITED (1)
* 4,799,258 Apparatus and methods for granting access to computers 167 1985
 
Atari, Inc. (1)
* 4,633,036 Method and apparatus for use in public-key data encryption system 60 1984
 
SIEMENS CORPORATION;INTELLECTUAL PROPERTY DEPARTMENT (2)
* 4,438,824 Apparatus and method for cryptographic identity verification 118 1981
* 4,458,109 Method and apparatus providing registered mail features in an electronic communication system 192 1982
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (11)
* 5,136,643 Public/key date-time notary facility 218 1990
* 5,150,407 Secured data storage devices 132 1991
* 5,422,953 Personal date/time notary device 156 1993
* 5,619,571 Method for securely storing electronic records 90 1995
* 5,936,149 Personal date/time notary device 16 1995
* 5,720,034 Method for secure key production 23 1995
* 5,748,960 Method and apparatus for validating travelling object-oriented programs with digital signatures 139 1996
* 6,105,072 Method and apparatus for validating travelling object-oriented programs with digital signatures 45 1997
6,408,388 Personal date/time notary device 30 1999
6,865,678 Personal date/time notary device 5 2002
8,868,914 System and methods for distributing trusted time 0 2008
 
FRENCH STATE REPRESENTED BY THE MINISTER OF POST, TELECOMMUNICATIONS AND SPACE (CENTRE NATIONAL D'ETUDES DES TELECOMMUNICATIONS) (1)
* 5,128,997 Wired microcircuit card and a method for transactions between a corresponding wired microcircuit card and a terminal 43 1990
 
CITIBANK, N.A. (8)
* 5,642,419 Method for acquiring and revalidating an electronic credential 285 1995
6,175,921 Tamper-proof devices for unique identification 63 1997
6,122,625 Apparatus and method for secure transacting 290 1998
* 7,028,187 Electronic transaction apparatus for electronic commerce 43 1998
* 6,088,797 Tamper-proof electronic processing device 71 1998
6,336,095 Method for electronic merchandise dispute resolution 114 1998
7,478,239 Electronic ticket vending system 4 1999
* 7,269,256 Electronic-monetary system 43 2002
 
SWISSCOM MOBILE AG (1)
* 7,409,552 Method for securing communications between a terminal and an additional user equipment 12 2002
 
The United States of America as represented by the Secretary of Commerce (1)
6,393,566 Time-stamp service for the national information network 60 1995
 
PITNEY BOWES INC. (7)
* 5,796,841 Secure user certification for electronic commerce employing value metering system 151 1995
* 6,802,005 Method and system for tracking a person's time at a location 10 1995
* 6,134,328 Secure user certification for electronic commerce employing value metering system 16 1998
* 7,539,648 Secure user certification for electronic commerce employing value metering system 3 2000
6,985,888 Secure user certification for electronic commerce employing value metering system 4 2000
6,907,399 Secure user certification for electronic commerce employing value metering system 4 2000
6,898,581 Secure user certification for electronic commerce employing value metering system 5 2000
 
HITACHI, LTD. (2)
7,340,610 Trusted time stamping storage system 3 2004
7,716,488 Trusted time stamping storage system 2 2008
 
APPLE INC. (1)
* 7,328,348 Method and system for securely timestamping digital data 1 2001
 
NXP B.V. (1)
6,571,344 Method and apparatus for authenticating time-sensitive interactive communications 25 1999
 
THALES HOLDINGS UK PLC (1)
* 7,650,508 Time stamping system 0 2002
 
DFS LINKAGES, INC. (4)
6,381,696 Method and system for transient key digital time stamps 29 1998
7,047,415 System and method for widely witnessed proof of time 19 2001
7,017,046 System and method for graphical indicia for the certification of records 26 2001
7,210,035 System and method for graphical indicia for the certification of records 21 2005
 
KABUSHIKI KAISHA TOSHIBA (1)
* 5,136,642 Cryptographic communication method and cryptographic communication device 51 1991
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (13)
* 5,200,999 Public key cryptosystem key management based on control vectors 126 1991
* 5,164,988 Method to establish and enforce a network cryptographic security policy in a public key cryptosystem 198 1991
* 5,444,780 Client/server based secure timekeeping system 63 1993
* 5,500,897 Client/server based secure timekeeping system 80 1994
* 5,926,551 System and method for certifying content of hard-copy documents 21 1995
* 6,826,685 Method and system for the digital certificate generation and distribution 9 1998
7,519,824 Time stamping method employing multiple receipts linked by a nonce 6 1999
7,490,241 Time stamping method employing user specified time 2 1999
7,315,948 Time stamping method employing a separate ticket and stub 5 1999
6,993,656 Time stamping method using aged time stamp receipts 4 1999
6,965,998 Time stamping method using time-based signature key 4 1999
6,918,042 Secure configuration of a digital certificate for a printer or other network device 22 2001
* 7,890,765 Generating and verifying trusted digital time stamp 0 2008
 
CHARTOLEAUX KG LIMITED LIABILITY COMPANY (1)
* 5,481,612 Process for the authentication of a data processing system by another data processing system 12 1993
 
SAP SE (1)
* 7,890,762 Differentiated proxy digital signatures 1 2004
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
* 5,224,163 Method for delegating authorization from one entity to another through the use of session encryption keys 302 1990
* 7,779,257 System and method for constraint resolution 0 2005
 
InterTrust Technologies Corp. (57)
6,157,721 Systems and methods using cryptography to protect secure computing environments 462 1996
5,943,422 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 826 1996
5,892,900 Systems and methods for secure transaction management and electronic rights protection 2045 1996
5,910,987 Systems and methods for secure transaction management and electronic rights protection 787 1996
5,917,912 System and methods for secure transaction management and electronic rights protection 633 1997
5,915,019 Systems and methods for secure transaction management and electronic rights protection 650 1997
5,920,861 Techniques for defining using and manipulating rights management data structures 566 1997
5,982,891 Systems and methods for secure transaction management and electronic rights protection 872 1997
6,112,181 Systems and methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 813 1997
6,253,193 Systems and methods for the secure transaction management and electronic rights protection 623 1998
6,185,683 Trusted and secure techniques, systems and methods for item delivery and execution 664 1998
6,240,185 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 329 1999
7,233,948 Methods and apparatus for persistent control and protection of content 173 1999
6,138,119 Techniques for defining, using and manipulating rights management data structures 442 1999
6,363,488 Systems and methods for secure transaction management and electronic rights protection 480 1999
7,133,845 System and methods for secure transaction management and electronic rights protection 130 1999
6,389,402 Systems and methods for secure transaction management and electronic rights protection 389 1999
6,237,786 Systems and methods for secure transaction management and electronic rights protection 392 1999
7,069,451 Systems and methods for secure transaction management and electronic rights protection 88 1999
6,427,140 Systems and methods for secure transaction management and electronic rights protection 374 1999
7,133,846 Digital certificate support system, methods and techniques for secure electronic commerce transaction and rights management 199 1999
6,658,568 Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management 426 1999
7,165,174 Trusted infrastructure support systems, methods and techniques for secure electronic commerce transaction and rights management 66 1999
7,092,914 Methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 44 2000
7,243,236 Systems and methods for using cryptography to protect secure and insecure computing environments 30 2000
7,430,670 Software self-defense systems and methods 97 2000
7,143,290 Trusted and secure techniques, systems and methods for item delivery and execution 34 2000
7,062,500 Techniques for defining, using and manipulating rights management data structures 85 2000
7,095,854 Systems and methods for secure transaction management and electronic rights protection 44 2000
6,292,569 Systems and methods using cryptography to protect secure computing environments 316 2000
6,948,070 Systems and methods for secure transaction management and electronic rights protection 122 2000
7,076,652 Systems and methods for secure transaction management and electronic rights protection 127 2001
6,449,367 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 291 2001
7,120,800 Systems and methods for secure transaction management and electronic rights protection 86 2001
7,120,802 Systems and methods for using cryptography to protect secure computing environments 33 2001
7,124,302 Systems and methods for secure transaction management and electronic rights protection 105 2001
7,051,212 Systems and methods for secure transaction management and electronic rights protection 54 2002
6,618,484 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 172 2002
7,143,066 Systems and methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 68 2002
7,110,983 Methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 72 2002
6,938,021 Methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 132 2002
8,307,212 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 1 2003
7,100,199 Systems and methods for secure transaction management and electronic rights protection 70 2003
8,751,793 Trusted infrastructure support systems, methods and techniques for secure electronic commerce transaction and rights management 2 2003
7,415,617 Trusted infrastructure support systems, methods and techniques for secure electronic commerce, electronic transactions, commerce process control and automation, distributed computing, and rights management 97 2004
7,392,395 Trusted and secure techniques, systems and methods for item delivery and execution 16 2005
7,281,133 Trusted and secure techniques, systems and methods for item delivery and execution 25 2005
7,844,835 Systems and methods for secure transaction management and electronic rights protection 13 2005
8,533,851 Systems and methods for secure transaction management and electronic rights protection 4 2006
8,185,473 Trusted infrastructure support systems, methods and techniques for secure electronic commerce, electronic transactions, commerce process control and automation, distributed computing, and rights management 20 2006
7,917,749 Systems and methods for secure transaction management and electronic rights protection 8 2006
8,543,842 System and methods for secure transaction management and electronics rights protection 1 2006
7,925,898 Systems and methods using cryptography to protect secure computing environments 6 2006
8,291,238 Systems and methods for secure transaction management and electronic rights protection 88 2007
8,639,625 Systems and methods for secure transaction management and electronic rights protection 1 2007
8,181,021 Systems and methods for secure transaction management and electronic rights protection 6 2007
8,055,913 Systems and methods for secure transaction management and electronic rights protection 8 2007
 
THE ASCENT GROUP LIMITED (2)
* 8,656,166 Storage and authentication of data transactions 1 2012
* 2012/0260,098 Storage and Authentication of Data Transactions 0 2012
 
EORIGINAL, INC. (1)
* 7,162,635 System and method for electronic transmission, storage, and retrieval of authenticated electronic original documents 30 2000
 
FUJITSU LIMITED (2)
6,253,331 Timer apparatus and computer 7 1998
6,507,910 Timer apparatus and computer 2 2001
 
SUN MICROSYSTEMS, INC. (1)
* 5,588,060 Method and apparatus for a key-management scheme for internet protocols 133 1994
 
CERTIFIED MEASUREMENTS, LLC (2)
6,289,453 Method and apparatus for secure measurement certification 108 1998
8,549,310 Method and apparatus for secure measurement certification 0 2009
 
WALKER ASSET MANAGEMENT LTD. PARTNERSHIP (2)
* 5,923,763 Method and apparatus for secure document timestamping 153 1996
* 5,828,751 Method and apparatus for secure measurement certification 96 1996
 
FIRST DATA CORPORATION (8)
7,552,333 Trusted authentication digital signature (tads) system 21 2001
7,500,272 Manufacturing unique devices that generate digital signatures 13 2001
7,936,869 Verifying digital signature based on shared knowledge 1 2005
7,869,593 Software for providing based on shared knowledge public keys having same private key 3 2005
7,693,277 Generating digital signatures using ephemeral cryptographic key 0 2005
7,593,527 Providing digital signature and public key based on shared knowledge 7 2005
7,490,239 Facilitating digital signature based on ephemeral private key 4 2005
7,784,106 Manufacturing unique devices that generate digital signatures 1 2009
 
GRAPHON CORPORATION (1)
8,510,226 Method for synchronous encryption between a client and a licensing agent 3 2007
 
INTEL CORPORATION (3)
* 6,389,537 Platform and method for assuring integrity of trusted agent communications 223 1999
6,948,065 Platform and method for securely transmitting an authorization secret 18 2000
7,076,802 Trusted system clock 9 2002
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
6,931,537 Folder type time stamping system and distributed time stamping system 16 2000
 
INTELLICHECK MOBILISA, INC. (2)
7,899,751 Parsing an identification document in accordance with a jurisdictional format 2 2009
8,566,244 Parsing an identification document in accordance with a jurisdictional format 0 2011
 
EMERSON RADIO CORP. (1)
* 7,359,288 Method and apparatus for automatically displaying a correct time and date when initially activating a clock 1 2003
 
TimeCertain, LLC (2)
6,792,536 Smart card system and methods for proving dates in digital files 88 1999
6,898,709 Personal computer system and methods for proving dates in digital data files 68 1999
 
SONY COMPUTER ENTERTAINMENT AMERICA LLC (2)
* 7,664,709 Method and system for securely distributing computer software products 6 2007
* 8,577,808 Methods for securely distributing computer software products 0 2010
 
GESCHLAAKT HOLDINGS GMBH, LLC (1)
6,209,090 Method and apparatus for providing secure time stamps for documents and computer files 30 1997
 
NEXSAN TECHNOLOGIES CANADA INC. (3)
7,801,871 Data archiving system 18 2006
8,086,578 Data archiving system 2 2010
8,843,461 Data archiving system 0 2011
 
XEROX CORPORATION (1)
* 5,157,726 Document copy authentication 141 1991
 
NEOPOST TECHNOLOGIES (1)
* 6,078,910 Printing postage with cryptographic clocking security 1 1998
 
DATUM CORP (LIMITED USE LICENSE FOR IP - NO PATENT FILING AUTHORIZATION) (1)
6,393,126 System and methods for generating trusted and authenticatable time stamps for electronic documents 49 2000
 
UNITED SERVICES AUTOMOBILE ASSOCIATION (USAA) (3)
8,083,129 Systems and methods for electronic document delivery, execution, and return 0 2008
8,286,859 Systems and methods for electronic document delivery, execution, and return 0 2011
8,708,225 Systems and methods for electronic document delivery, execution, and return 0 2012
 
INVENTOR HOLDINGS, LLC (7)
8,055,509 Methods and apparatus for increasing and/or for monitoring a party's compliance with a schedule for taking medicines 5 2000
6,959,387 Method and apparatus for verifying secure document timestamping 2 2001
RE41960 Method and apparatus for verifying secure document timestamping 0 2005
8,069,056 Methods and apparatus for increasing and/or for monitoring a party's compliance with a schedule for taking medicines 11 2006
7,801,745 Methods and apparatus for increasing and/or monitoring a party's compliance with a schedule for taking medicines 12 2006
RE42893 Method and apparatus for verifying secure document timestamping 1 2006
RE42018 Method and apparatus for verifying secure document timestamping 0 2006
 
MICROSOFT TECHNOLOGY LICENSING, LLC (11)
8,347,078 Device certificate individualization 0 2004
* 8,464,348 Isolated computing environment anchored into CPU and motherboard 0 2004
8,725,646 Output protection levels 0 2005
8,438,645 Secure clock with grace periods 0 2005
8,353,046 System and method for delivery of a modular operating system 1 2005
8,176,564 Special PC mode entered upon detection of undesired state 2 2005
8,336,085 Tuning product policy using observed evidence of customer behavior 0 2005
* 8,190,923 Method to securely initialize, protect and recover system date/time 2 2005
8,700,535 Issuing a publisher use license off-line in a digital rights management (DRM) system 0 2008
8,719,171 Issuing a publisher use license off-line in a digital rights management (DRM) system 0 2010
8,781,969 Extensible media rights 0 2010
 
TIME CERTAIN, LLC. (3)
6,948,069 Method and system for determining and maintaining trust in digital image files with certifiable time 46 2000
* 6,895,507 Method and system for determining and maintaining trust in digital data files with certifiable time 57 2000
7,409,557 System and method for distributing trusted time 9 2005
 
GOOGLE INC. (1)
6,742,119 Time stamping method using time delta in key certificate 11 1999
 
WALKER ASSET MANAGEMENT LIMITED PARTNERSHIP (1)
6,263,438 Method and apparatus for secure document timestamping 85 1998
 
CRYPTOMATHIC A/S (1)
* 7,505,945 Electronic negotiable documents 0 2000
 
S.F. IP PROPERTIES 59 LLC (2)
7,209,889 Secure system for the issuance, acquisition, and redemption of certificates in a transaction network 39 1999
7,899,755 Secure system for the issuance, acquisition, and redemption of certificates in a transaction network 1 2007
 
WALKER DIGITAL, LLC (3)
* 6,111,953 Method and apparatus for authenticating a document 66 1997
7,553,235 Method and apparatus for outputting a result of a game via a container 4 2006
8,250,369 Method and apparatus for secure measurement certification 0 2009
 
CERTCO, INC. (6)
* 6,009,177 Enhanced cryptographic system and method with key escrow feature 250 1997
* 5,872,849 Enhanced cryptographic system and method with key escrow feature 86 1997
* 5,857,022 Enhanced cryptographic system and method with key escrow feature 63 1997
* 5,850,451 Enhanced cryptographic system and method with key escrow feature 76 1997
* 5,799,086 Enhanced cryptographic system and method with key escrow feature 214 1997
* 5,841,865 Enhanced cryptographic system and method with key escrow feature 120 1997
 
PREMINOS CORPORATION (1)
* 5,812,669 Method and system for providing secure EDI over an open network 96 1995
 
ROVI SOLUTIONS CORPORATION (3)
8,479,305 Method and system for managing a data object so as to comply with predetermined conditions for usage 0 1998
8,479,306 Method and system for managing a data object so as to comply with predetermined condition for usage 0 1999
* 8,474,058 Method and system for managing a data object so as to comply with predetermined conditions for usage 2 2003
 
RMAIL LIMITED (1)
* 6,182,219 Apparatus and method for authenticating the dispatch and contents of documents 58 1997
 
RDSK, INC. (1)
* 6,848,048 Method and apparatus for providing verifiable digital signatures 33 2000
 
JORASCH, JAMES A. (6)
7,553,234 Method and apparatus for outputting a result of a game via a container 5 2004
8,092,224 Systems and methods for improved health care compliance 6 2005
8,556,728 Method and apparatus for outputting a result of a game via a container 0 2006
8,353,752 Method and apparatus for outputting a result of a game via a container 0 2006
8,262,394 Systems and methods for improved health care compliance 0 2006
7,821,404 Systems and methods for improved health care compliance 9 2006
 
SURETY, LLC (1)
* 5,373,561 Method of extending the validity of a cryptographic certificate 222 1992
 
TELCORDIA TECHNOLOGIES, INC. (2)
* 5,136,646 Digital document time-stamping with catenate certificate 302 1991
* RE34954 Method for secure time-stamping of digital documents 168 1993
 
LOAS TEI PTE., LLC (1)
6,530,023 Method and device that validates time of an internal source using an external source 26 1998
 
E-CONTACT TECHNOLOGIES LLC (1)
* 5,189,700 Devices to (1) supply authenticated time and (2) time stamp and authenticate digital documents 102 1991
 
AT&T CORP. (4)
* 6,101,603 System and method for using a second resource to store a data element from a first resource in a first-in last-out stack 1 1998
* 6,098,170 System and method for using a second resource to store a data element from a first resource in a first-in first-out queue 2 1998
6,249,871 System and method for using a second resource to store a data element from a first resource in a first-in last-out stack 0 2000
6,237,094 System and method for using a second resource to store a data element from a first resource in a first-in first-out queue 0 2000
* Cited By Examiner